Stovepipe.



No. 776.626. PATENTED DEC. 6, 1904b H. F. STRBHLOW;

' STOVEPIPB.

APPLICATION FILED MAY 13.-l904.

N0 MODEL.

@awiwr -M/ WMQ UNITED STAT S Patented December 6, 1904.

PATENT OFFICE.

STOVEPIPE.

SPECIFICATION forming part of Letters Patent N 0. 776,626, dated December 6, 1904. Application filed May 13, 1904. Serial No- 207,721. (No model.)

To all whom it may concern.-

Be it known that I, HERMAN F. S'rRnI-ILow, a citizen of the United States, residing at Casselton, in the county of Cass and State of North Dakota, have invented certain new and useful Improvements in Stovepipes; and l do hereby declare the following to be a full, clear, and exact description of the invention, such as will onable others skilled in the art to which it appertains to make and use the same.

My invention relates to stovepipes, and has for its object to provide a knockdown stovepipe-section having interlocking edges.

To the above ends the invention consists of the novel devices and combinations of devices hereinafterdescribed, and defined in the claim.

The invention is illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the several views.

Figure 1 is a view in elevation showing a Stovepipe-section designed in accordance with my invention, the interlocking edges thereof being shown as separated. Fig. 2 is a section on the line m m of Fig. 1. Fig. 3 is a section on the line w m of Fig. 1. Fig. .4: is a section on the same line as Fig. 3, but with the interlocking edges of the pipe-section pressed together, some parts of the pipe be ing broken away; and Fig. 5 is a partial section on the same line as Fig. 2, but showing the edges of the pipe-section interlocking.

The numeral 1 indicates a Stovepipe-section which is split or divided longitudinally at one side and is formed with interlocking parts constructed as follows: Atone end--to wit, as shown in Fig. 1, its upper end-the longitudinal edges of the pipe-section are formed with back-turned interlocking flanges 2, one of which is turned outward and the other of which is turned inward.

Extending around the pipe, approximately at the inner extremities of the lock-flanges 2, is an outwardly-pressed bead 3, and at approximately the same distance from the other end of the pipe-section is a similar outwardlypressed bead i. I The longitudinal edges of the pipe-section, between the beads 3 and 4 and slightly inward from the extreme edges,

areformed with approximately V-shaped inwardly-pressed longitudinally-extended beads 5 and 6. The edge portion containing the bead b is united to the body of the pipe by a fold 7, which affords a shallow longitudinallyextended seat 8 for the opposite edge 5 of the pipe-section.

In securing the longitudinal edges of the pipe-section the interlocking flanges 52, at the upper ends thereof, are first interlocked, as shown in Fig. 5, and then the intermediate edge portions of the pipe-sections are forced together, as shown in Fig. 4, by reference to which it will be seen that the bead5 is forced into the channel of the bead 6, while the projecting edge 5 is forced into the seat 8 of the fold 7. Theengaged flanges2 positively prevent expansion of the upper end of the pipesection, and the engaged heads 5 and 6 and the edge 5 and seat 8 operate under spring tension and friction to prevent expansion of thepipe-section. Then the pipe-sections are telescoped, the positively interlocked upper end of the lower section will telescope over the contracted lower end of an upper section, and in this way the longitudinal edges of the pipe-sections are securely interlocked.

The joint above described may be very quickly interlocked or disconnected and is practically air-tight. ,liurthermore, the interlocking parts of the pipe-sections are formed entirely from portions of the body of the pipe-sections bent to proper form, and hence the construction is cheap.

As is evident, when the longitudinal edges of the pipe-sections are disconnected the said sections may be turned flat or may be bent, so that a large number of sections may be telescoped one within the other. This feature is of course important for the purposes of shipment and storage.

It will of course be understood that the device describcd is capable of modification with in the scope of my invention as herein set forth and claimed.

What I claim, and desire to secure by Letters Patent of the United States, is as follows:

A stovepipe-section, split at one side from end to end, the edges thereof being reversely respectively, said head 5 and edge flange 5, bent at one end to form the interlocking substantially as described. IO flanges 2, the intermediate portion of one edge In testimony whereof I aflix my signature in being bent to form the longitudinal bead 5 presence of two Witnesses.

5 and edge flange 5, and the intermediate por- HERMAN F. STREHLOW.

tion of the other edge being bent to form the l/Vitnesses: longitudinal bead 6, fold 7 and seat 8, said G. S. CHURCHILL,

bead 6 and seat8 being constructed to receive, A. T. KIRKMAN. 

